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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_INODE_H__
19#define __XFS_INODE_H__
20
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020021struct posix_acl;
Christoph Hellwig347d1c02007-08-28 13:57:51 +100022struct xfs_dinode;
Barry Naujok847fff52008-10-30 17:05:38 +110023struct xfs_inode;
Christoph Hellwig347d1c02007-08-28 13:57:51 +100024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/*
Nathan Scotta844f452005-11-02 14:38:42 +110026 * Fork identifiers.
27 */
28#define XFS_DATA_FORK 0
29#define XFS_ATTR_FORK 1
30
31/*
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110032 * The following xfs_ext_irec_t struct introduces a second (top) level
33 * to the in-core extent allocation scheme. These structs are allocated
34 * in a contiguous block, creating an indirection array where each entry
35 * (irec) contains a pointer to a buffer of in-core extent records which
36 * it manages. Each extent buffer is 4k in size, since 4k is the system
37 * page size on Linux i386 and systems with larger page sizes don't seem
38 * to gain much, if anything, by using their native page size as the
39 * extent buffer size. Also, using 4k extent buffers everywhere provides
40 * a consistent interface for CXFS across different platforms.
41 *
42 * There is currently no limit on the number of irec's (extent lists)
43 * allowed, so heavily fragmented files may require an indirection array
44 * which spans multiple system pages of memory. The number of extents
45 * which would require this amount of contiguous memory is very large
46 * and should not cause problems in the foreseeable future. However,
47 * if the memory needed for the contiguous array ever becomes a problem,
48 * it is possible that a third level of indirection may be required.
49 */
50typedef struct xfs_ext_irec {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100051 xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110052 xfs_extnum_t er_extoff; /* extent offset in file */
53 xfs_extnum_t er_extcount; /* number of extents in page/block */
54} xfs_ext_irec_t;
55
56/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 * File incore extent information, present for each of data & attr forks.
58 */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110059#define XFS_IEXT_BUFSZ 4096
60#define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
61#define XFS_INLINE_EXTS 2
62#define XFS_INLINE_DATA 32
Linus Torvalds1da177e2005-04-16 15:20:36 -070063typedef struct xfs_ifork {
64 int if_bytes; /* bytes in if_u1 */
65 int if_real_bytes; /* bytes allocated in if_u1 */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110066 struct xfs_btree_block *if_broot; /* file's incore btree root */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 short if_broot_bytes; /* bytes allocated for root */
68 unsigned char if_flags; /* per-fork flags */
69 unsigned char if_ext_max; /* max # of extent records */
70 xfs_extnum_t if_lastex; /* last if_extents used */
71 union {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100072 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110073 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 char *if_data; /* inline file data */
75 } if_u1;
76 union {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100077 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 /* very small file extents */
79 char if_inline_data[XFS_INLINE_DATA];
80 /* very small file data */
81 xfs_dev_t if_rdev; /* dev number if special */
82 uuid_t if_uuid; /* mount point value */
83 } if_u2;
84} xfs_ifork_t;
85
86/*
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110087 * Inode location information. Stored in the inode and passed to
88 * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
89 */
90struct xfs_imap {
91 xfs_daddr_t im_blkno; /* starting BB of inode chunk */
92 ushort im_len; /* length in BBs of inode chunk */
93 ushort im_boffset; /* inode offset in block in bytes */
94};
95
96/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 * This is the xfs in-core inode structure.
98 * Most of the on-disk inode is embedded in the i_d field.
99 *
100 * The extent pointers/inline file space, however, are managed
101 * separately. The memory for this information is pointed to by
102 * the if_u1 unions depending on the type of the data.
103 * This is used to linearize the array of extents for fast in-core
104 * access. This is used until the file's number of extents
105 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
106 * are accessed through the buffer cache.
107 *
108 * Other state kept in the in-core inode is used for identification,
109 * locking, transactional updating, etc of the inode.
110 *
111 * Generally, we do not want to hold the i_rlock while holding the
112 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
113 *
114 * xfs_iptr_t contains all the inode fields upto and including the
115 * i_mnext and i_mprev fields, it is used as a marker in the inode
116 * chain off the mount structure by xfs_sync calls.
117 */
118
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000119typedef struct xfs_ictimestamp {
120 __int32_t t_sec; /* timestamp seconds */
121 __int32_t t_nsec; /* timestamp nanoseconds */
122} xfs_ictimestamp_t;
123
124/*
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100125 * NOTE: This structure must be kept identical to struct xfs_dinode
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200126 * in xfs_dinode.h except for the endianness annotations.
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000127 */
128typedef struct xfs_icdinode {
129 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
130 __uint16_t di_mode; /* mode and type of file */
131 __int8_t di_version; /* inode version */
132 __int8_t di_format; /* format of di_c data */
133 __uint16_t di_onlink; /* old number of links to file */
134 __uint32_t di_uid; /* owner's user id */
135 __uint32_t di_gid; /* owner's group id */
136 __uint32_t di_nlink; /* number of links to file */
137 __uint16_t di_projid; /* owner's project id */
138 __uint8_t di_pad[8]; /* unused, zeroed space */
139 __uint16_t di_flushiter; /* incremented on flush */
140 xfs_ictimestamp_t di_atime; /* time last accessed */
141 xfs_ictimestamp_t di_mtime; /* time last modified */
142 xfs_ictimestamp_t di_ctime; /* time created/inode modified */
143 xfs_fsize_t di_size; /* number of bytes in file */
144 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
145 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
146 xfs_extnum_t di_nextents; /* number of extents in data fork */
147 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
148 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
149 __int8_t di_aformat; /* format of attr fork's data */
150 __uint32_t di_dmevmask; /* DMIG event mask */
151 __uint16_t di_dmstate; /* DMIG state info */
152 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
153 __uint32_t di_gen; /* generation number */
154} xfs_icdinode_t;
155
Barry Naujok847fff52008-10-30 17:05:38 +1100156/*
157 * Flags for xfs_ichgtime().
158 */
159#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
160#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
161
162/*
163 * Per-fork incore inode flags.
164 */
165#define XFS_IFINLINE 0x01 /* Inline data is read in */
166#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
167#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
168#define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
169
170/*
Barry Naujok847fff52008-10-30 17:05:38 +1100171 * Fork handling.
172 */
173
174#define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
175#define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
176
177#define XFS_IFORK_PTR(ip,w) \
178 ((w) == XFS_DATA_FORK ? \
179 &(ip)->i_df : \
180 (ip)->i_afp)
181#define XFS_IFORK_DSIZE(ip) \
182 (XFS_IFORK_Q(ip) ? \
183 XFS_IFORK_BOFF(ip) : \
184 XFS_LITINO((ip)->i_mount))
185#define XFS_IFORK_ASIZE(ip) \
186 (XFS_IFORK_Q(ip) ? \
187 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
188 0)
189#define XFS_IFORK_SIZE(ip,w) \
190 ((w) == XFS_DATA_FORK ? \
191 XFS_IFORK_DSIZE(ip) : \
192 XFS_IFORK_ASIZE(ip))
193#define XFS_IFORK_FORMAT(ip,w) \
194 ((w) == XFS_DATA_FORK ? \
195 (ip)->i_d.di_format : \
196 (ip)->i_d.di_aformat)
197#define XFS_IFORK_FMT_SET(ip,w,n) \
198 ((w) == XFS_DATA_FORK ? \
199 ((ip)->i_d.di_format = (n)) : \
200 ((ip)->i_d.di_aformat = (n)))
201#define XFS_IFORK_NEXTENTS(ip,w) \
202 ((w) == XFS_DATA_FORK ? \
203 (ip)->i_d.di_nextents : \
204 (ip)->i_d.di_anextents)
205#define XFS_IFORK_NEXT_SET(ip,w,n) \
206 ((w) == XFS_DATA_FORK ? \
207 ((ip)->i_d.di_nextents = (n)) : \
208 ((ip)->i_d.di_anextents = (n)))
209
210
211
212#ifdef __KERNEL__
213
214struct bhv_desc;
215struct cred;
Barry Naujok847fff52008-10-30 17:05:38 +1100216struct xfs_buf;
217struct xfs_bmap_free;
218struct xfs_bmbt_irec;
Barry Naujok847fff52008-10-30 17:05:38 +1100219struct xfs_inode_log_item;
220struct xfs_mount;
221struct xfs_trans;
222struct xfs_dquot;
223
Barry Naujok847fff52008-10-30 17:05:38 +1100224typedef struct dm_attrs_s {
225 __uint32_t da_dmevmask; /* DMIG event mask */
226 __uint16_t da_dmstate; /* DMIG state info */
227 __uint16_t da_pad; /* DMIG extra padding */
228} dm_attrs_t;
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230typedef struct xfs_inode {
231 /* Inode linking and identification information. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 struct xfs_mount *i_mount; /* fs mount struct ptr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 struct xfs_dquot *i_udquot; /* user dquot */
234 struct xfs_dquot *i_gdquot; /* group dquot */
235
236 /* Inode location stuff */
237 xfs_ino_t i_ino; /* inode number (agno/agino)*/
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +1100238 struct xfs_imap i_imap; /* location for xfs_imap() */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240 /* Extent information. */
241 xfs_ifork_t *i_afp; /* attribute fork pointer */
242 xfs_ifork_t i_df; /* data fork */
243
244 /* Transaction and locking information. */
245 struct xfs_trans *i_transp; /* ptr to owning transaction*/
246 struct xfs_inode_log_item *i_itemp; /* logging information */
247 mrlock_t i_lock; /* inode lock */
248 mrlock_t i_iolock; /* inode IO lock */
David Chinnerc63942d2008-08-13 16:41:16 +1000249 struct completion i_flush; /* inode flush completion q */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 atomic_t i_pincount; /* inode pin count */
251 wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
David Chinnerf273ab82006-09-28 11:06:03 +1000252 spinlock_t i_flags_lock; /* inode i_flags lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 /* Miscellaneous state. */
254 unsigned short i_flags; /* see defined flags below */
255 unsigned char i_update_core; /* timestamps/size is dirty */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 unsigned int i_delayed_blks; /* count of delay alloc blks */
257
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000258 xfs_icdinode_t i_d; /* most of ondisk inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Lachlan McIlroyba87ea62007-05-08 13:49:46 +1000260 xfs_fsize_t i_size; /* in-memory size */
Christoph Hellwig613d7042007-10-11 17:44:08 +1000261 xfs_fsize_t i_new_size; /* size when write completes */
Christoph Hellwigb677c212007-08-29 11:46:28 +1000262 atomic_t i_iocount; /* outstanding I/O count */
David Chinnerbf904242008-10-30 17:36:14 +1100263
264 /* VFS inode */
265 struct inode i_vnode; /* embedded VFS inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266} xfs_inode_t;
267
Lachlan McIlroyba87ea62007-05-08 13:49:46 +1000268#define XFS_ISIZE(ip) (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
269 (ip)->i_size : (ip)->i_d.di_size;
David Chinner7a18c382006-11-11 18:04:54 +1100270
David Chinner01651642008-08-13 15:45:15 +1000271/* Convert from vfs inode to xfs inode */
272static inline struct xfs_inode *XFS_I(struct inode *inode)
273{
David Chinnerbf904242008-10-30 17:36:14 +1100274 return container_of(inode, struct xfs_inode, i_vnode);
David Chinner01651642008-08-13 15:45:15 +1000275}
276
David Chinner01651642008-08-13 15:45:15 +1000277/* convert from xfs inode to vfs inode */
278static inline struct inode *VFS_I(struct xfs_inode *ip)
279{
David Chinnerbf904242008-10-30 17:36:14 +1100280 return &ip->i_vnode;
David Chinner01651642008-08-13 15:45:15 +1000281}
David Chinner01651642008-08-13 15:45:15 +1000282
David Chinner7a18c382006-11-11 18:04:54 +1100283/*
284 * i_flags helper functions
285 */
286static inline void
287__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
288{
289 ip->i_flags |= flags;
290}
291
292static inline void
293xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
294{
295 spin_lock(&ip->i_flags_lock);
296 __xfs_iflags_set(ip, flags);
297 spin_unlock(&ip->i_flags_lock);
298}
299
300static inline void
301xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
302{
303 spin_lock(&ip->i_flags_lock);
304 ip->i_flags &= ~flags;
305 spin_unlock(&ip->i_flags_lock);
306}
307
308static inline int
309__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
310{
311 return (ip->i_flags & flags);
312}
313
314static inline int
315xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
316{
317 int ret;
318 spin_lock(&ip->i_flags_lock);
319 ret = __xfs_iflags_test(ip, flags);
320 spin_unlock(&ip->i_flags_lock);
321 return ret;
322}
Christoph Hellwig09262b42007-08-29 11:44:50 +1000323
324static inline int
325xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
326{
327 int ret;
328
329 spin_lock(&ip->i_flags_lock);
330 ret = ip->i_flags & flags;
331 if (ret)
332 ip->i_flags &= ~flags;
333 spin_unlock(&ip->i_flags_lock);
334 return ret;
335}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337/*
Barry Naujok847fff52008-10-30 17:05:38 +1100338 * Manage the i_flush queue embedded in the inode. This completion
339 * queue synchronizes processes attempting to flush the in-core
340 * inode back to disk.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 */
Barry Naujok847fff52008-10-30 17:05:38 +1100342static inline void xfs_iflock(xfs_inode_t *ip)
343{
344 wait_for_completion(&ip->i_flush);
345}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Barry Naujok847fff52008-10-30 17:05:38 +1100347static inline int xfs_iflock_nowait(xfs_inode_t *ip)
348{
349 return try_wait_for_completion(&ip->i_flush);
350}
Christoph Hellwig45ba5982007-12-07 14:07:20 +1100351
Barry Naujok847fff52008-10-30 17:05:38 +1100352static inline void xfs_ifunlock(xfs_inode_t *ip)
353{
354 complete(&ip->i_flush);
355}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
357/*
358 * In-core inode flags.
359 */
Christoph Hellwig6bd16ff2008-12-03 12:20:32 +0100360#define XFS_IRECLAIM 0x0001 /* we have started reclaiming this inode */
361#define XFS_ISTALE 0x0002 /* inode has been staled */
362#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */
363#define XFS_INEW 0x0008 /* inode has just been allocated */
364#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */
365#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367/*
368 * Flags for inode locking.
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000369 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
370 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 */
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000372#define XFS_IOLOCK_EXCL (1<<0)
373#define XFS_IOLOCK_SHARED (1<<1)
374#define XFS_ILOCK_EXCL (1<<2)
375#define XFS_ILOCK_SHARED (1<<3)
376#define XFS_IUNLOCK_NONOTIFY (1<<4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000378#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000379 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000380
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000381#define XFS_LOCK_FLAGS \
382 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
383 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
384 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
385 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
386 { XFS_IUNLOCK_NONOTIFY, "IUNLOCK_NONOTIFY" }
387
388
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000389/*
390 * Flags for lockdep annotations.
391 *
392 * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
393 * (ie directory operations that require locking a directory inode and
394 * an entry inode). The first inode gets locked with this flag so it
395 * gets a lockdep subclass of 1 and the second lock will have a lockdep
396 * subclass of 0.
397 *
David Chinner0f1145c2007-06-29 17:26:09 +1000398 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000399 * with xfs_lock_inodes(). This flag is used as the starting subclass
400 * and each subsequent lock acquired will increment the subclass by one.
401 * So the first lock acquired will have a lockdep subclass of 2, the
David Chinner0f1145c2007-06-29 17:26:09 +1000402 * second lock will have a lockdep subclass of 3, and so on. It is
403 * the responsibility of the class builder to shift this to the correct
404 * portion of the lock_mode lockdep mask.
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000405 */
David Chinner0f1145c2007-06-29 17:26:09 +1000406#define XFS_LOCK_PARENT 1
407#define XFS_LOCK_INUMORDER 2
408
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000409#define XFS_IOLOCK_SHIFT 16
David Chinner0f1145c2007-06-29 17:26:09 +1000410#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000411
412#define XFS_ILOCK_SHIFT 24
David Chinner0f1145c2007-06-29 17:26:09 +1000413#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000414
415#define XFS_IOLOCK_DEP_MASK 0x00ff0000
416#define XFS_ILOCK_DEP_MASK 0xff000000
417#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
418
419#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
420#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 * Flags for xfs_itruncate_start().
424 */
425#define XFS_ITRUNC_DEFINITE 0x1
426#define XFS_ITRUNC_MAYBE 0x2
427
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000428#define XFS_ITRUNC_FLAGS \
429 { XFS_ITRUNC_DEFINITE, "DEFINITE" }, \
430 { XFS_ITRUNC_MAYBE, "MAYBE" }
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432/*
433 * For multiple groups support: if S_ISGID bit is set in the parent
434 * directory, group of new file is set to that of the parent, and
435 * new subdirectory gets S_ISGID bit from parent.
436 */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000437#define XFS_INHERIT_GID(pip) \
438 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
439 ((pip)->i_d.di_mode & S_ISGID))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441/*
442 * xfs_iget.c prototypes.
443 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
445 uint, uint, xfs_inode_t **, xfs_daddr_t);
446void xfs_iput(xfs_inode_t *, uint);
447void xfs_iput_new(xfs_inode_t *, uint);
448void xfs_ilock(xfs_inode_t *, uint);
449int xfs_ilock_nowait(xfs_inode_t *, uint);
450void xfs_iunlock(xfs_inode_t *, uint);
451void xfs_ilock_demote(xfs_inode_t *, uint);
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000452int xfs_isilocked(xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453uint xfs_ilock_map_shared(xfs_inode_t *);
454void xfs_iunlock_map_shared(xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455void xfs_ireclaim(xfs_inode_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457/*
458 * xfs_inode.c prototypes.
459 */
Nathan Scott31b084a2005-05-05 13:25:00 -0700460int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
David Howellsb6dff3e2008-11-14 10:39:16 +1100461 xfs_nlink_t, xfs_dev_t, cred_t *, xfs_prid_t,
Nathan Scott31b084a2005-05-05 13:25:00 -0700462 int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464uint xfs_ip2xflags(struct xfs_inode *);
Christoph Hellwig45ba5982007-12-07 14:07:20 +1100465uint xfs_dic2xflags(struct xfs_dinode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
467 struct xfs_bmap_free *);
Lachlan McIlroyd3cf2092007-05-08 13:49:27 +1000468int xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469int xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
470 xfs_fsize_t, int, int);
471int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473void xfs_iext_realloc(xfs_inode_t *, int, int);
Dave Chinner777df5a2010-02-06 12:37:26 +1100474void xfs_iunpin_wait(xfs_inode_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475int xfs_iflush(xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476void xfs_ichgtime(xfs_inode_t *, int);
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000477void xfs_lock_inodes(xfs_inode_t **, int, uint);
Christoph Hellwige1cccd92008-08-13 16:18:07 +1000478void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000480void xfs_synchronize_times(xfs_inode_t *);
Christoph Hellwig66d834e2010-02-15 09:44:49 +0000481void xfs_mark_inode_dirty(xfs_inode_t *);
David Chinner5d51eff2007-11-23 16:29:18 +1100482void xfs_mark_inode_dirty_sync(xfs_inode_t *);
Christoph Hellwig42fe2b12006-01-11 15:35:17 +1100483
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100484#define IHOLD(ip) \
485do { \
486 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
487 atomic_inc(&(VFS_I(ip)->i_count)); \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000488 trace_xfs_ihold(ip, _THIS_IP_); \
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100489} while (0)
490
491#define IRELE(ip) \
492do { \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000493 trace_xfs_irele(ip, _THIS_IP_); \
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100494 iput(VFS_I(ip)); \
495} while (0)
496
Barry Naujok847fff52008-10-30 17:05:38 +1100497#endif /* __KERNEL__ */
498
Christoph Hellwig6d73cf12008-12-09 04:47:32 -0500499/*
500 * Flags for xfs_iget()
501 */
502#define XFS_IGET_CREATE 0x1
503#define XFS_IGET_BULKSTAT 0x2
504
Christoph Hellwigc679eef2008-10-30 18:04:13 +1100505int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
506 xfs_ino_t, struct xfs_dinode **,
507 struct xfs_buf **, int *, uint);
Barry Naujok847fff52008-10-30 17:05:38 +1100508int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
509 struct xfs_inode *, struct xfs_dinode **,
Christoph Hellwig76d8b272008-11-28 14:23:40 +1100510 struct xfs_buf **, uint);
Christoph Hellwig6d73cf12008-12-09 04:47:32 -0500511int xfs_iread(struct xfs_mount *, struct xfs_trans *,
512 struct xfs_inode *, xfs_daddr_t, uint);
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100513void xfs_dinode_to_disk(struct xfs_dinode *,
Barry Naujok847fff52008-10-30 17:05:38 +1100514 struct xfs_icdinode *);
515void xfs_idestroy_fork(struct xfs_inode *, int);
516void xfs_idata_realloc(struct xfs_inode *, int, int);
517void xfs_iroot_realloc(struct xfs_inode *, int, int);
518int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
519int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
520
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000521xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
Christoph Hellwig6ef35542009-11-25 00:00:21 +0000522void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
523 xfs_bmbt_irec_t *, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100524void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100525void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
Christoph Hellwig6ef35542009-11-25 00:00:21 +0000526void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100527void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
528void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100529void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100530void xfs_iext_realloc_direct(xfs_ifork_t *, int);
531void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
532void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
533void xfs_iext_destroy(xfs_ifork_t *);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000534xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100535xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
536xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
537void xfs_iext_irec_init(xfs_ifork_t *);
538xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
539void xfs_iext_irec_remove(xfs_ifork_t *, int);
540void xfs_iext_irec_compact(xfs_ifork_t *);
541void xfs_iext_irec_compact_pages(xfs_ifork_t *);
542void xfs_iext_irec_compact_full(xfs_ifork_t *);
543void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
546
547#ifdef DEBUG
Barry Naujok847fff52008-10-30 17:05:38 +1100548void xfs_isize_check(struct xfs_mount *, struct xfs_inode *,
549 xfs_fsize_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550#else /* DEBUG */
551#define xfs_isize_check(mp, ip, isize)
552#endif /* DEBUG */
553
554#if defined(DEBUG)
555void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
556#else
557#define xfs_inobp_check(mp, bp)
558#endif /* DEBUG */
559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560extern struct kmem_zone *xfs_ifork_zone;
561extern struct kmem_zone *xfs_inode_zone;
562extern struct kmem_zone *xfs_ili_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564#endif /* __XFS_INODE_H__ */